package com.shop.config;

import feign.RequestInterceptor;
import feign.RequestTemplate;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;

@Configuration
public class FeignConfig {

    @Bean
    public RequestInterceptor requestInterceptor() {

        return new RequestInterceptor() {
            @Override
            public void apply(RequestTemplate template) {
                //1.RequestContextHolder拿到刚进来的请求
                ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
                if (attributes != null) {
                    System.out.println("RequestInterceptor线程..." + Thread.currentThread().getId());
                    HttpServletRequest request = attributes.getRequest();//旧请求
                    //feign在异步远程调用时也会出现请求头部丢失事件
                    if (request != null) {
                        //同步请求头，cookie
                        String cookie = request.getHeader("Cookie");
                        template.header("Cookie", cookie);
                    }
                }
            }
        };
    }



}